Tray holder



FIG. 1 is a front top right-side perspective view of a tray holder showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom back left perspective view thereof.

The broken lines in FIGS. 1-5, and 7-8 depict portions of the tray holder that form no part of the claimed design. 

CLAIM The ornamental design for a tray holder, as shown and described. 